Openshift custom /etc/hosts config

To add custom entries in the /etc/hosts file of pods, you can utilize the hostAliases field in the deployment configuration. This field allows you to define a list of custom hostname and IP address mappings.

Here’s an example of how you can add a custom entry using the oc command-line tool:

$ oc get deployment httpd1 -o yaml | grep -A4 -B14 hostAliases
    spec:
      containers:
      - image: image-registry.openshift-image-registry.svc:5000/iamgini-dev/httpd1@sha256:b58b0719265d8b1a5beacfb42f4f2e946905c1ba4069c9949834edf97db3ace2
        imagePullPolicy: Always
        name: httpd1
        ports:
        - containerPort: 8080
          protocol: TCP
        - containerPort: 8443
          protocol: TCP
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      hostAliases:
      - hostnames:
        - myadded.example.com
        ip: 192.168.1.1
      restartPolicy: Always

 

https://www.techbeatly.com/adding-custom-entries-in-etc-hosts-file-in-kubernetes-and-openshift-containers/